Tagged articles

cross-datacenter replication

3 articles · Page 1 of 1

Jun 27, 2026 · Operations

Cross‑Data‑Center Replication at Ten‑Million QPS: From Async to Semi‑Sync and How to Choose

The article examines why cross‑datacenter replication must evolve from simple asynchronous copying to semi‑synchronous and layered strategies at the ten‑million‑QPS scale, detailing latency, RPO, bandwidth costs, failover complexities, and practical selection guidelines for each business tier.

asynchronous replicationbandwidth optimizationcross-datacenter replication

0 likes · 17 min read

Cross‑Data‑Center Replication at Ten‑Million QPS: From Async to Semi‑Sync and How to Choose

Past Memory Big Data

Sep 13, 2024 · Backend Development

How Didi Scales Online Search with Elasticsearch: Architecture, Performance, and Stability

The article details Didi's comprehensive use of Elasticsearch across all online retrieval scenarios, covering its physical‑machine architecture, gateway and control layers, data synchronization methods, cross‑datacenter replication, JDK17 + ZGC performance upgrades, cost‑saving ZSTD compression, multi‑tenant isolation, custom security, and ongoing stability practices leading to a planned upgrade to Elasticsearch 8.13.

DidiElasticsearchMulti-tenant Isolation

0 likes · 16 min read

How Didi Scales Online Search with Elasticsearch: Architecture, Performance, and Stability

Didi Tech

Aug 7, 2023 · Backend Development

How Didi Achieved Cross‑Datacenter Elasticsearch Replication for Strong Consistency

This article explains Didi's self‑developed DCDR system that replicates Elasticsearch indices across data‑center clusters, detailing its design goals, core mechanisms, chain construction, historical data recovery, real‑time sync, and data‑quality validation to ensure high availability and strong consistency.

DCDRElasticsearchcross-datacenter replication

0 likes · 15 min read

How Didi Achieved Cross‑Datacenter Elasticsearch Replication for Strong Consistency